Improvement in machines for making eyelets



2 Sheets-Sheet l. A. DELKESOAMP & F. B. BRADLEY.

Machine for Making Eyelets. No. 204,736.

Patented .lunefl,1878.

' 2 SheetsSheet 2..

A. DELKESOAMP & P. HADLEY.

Machine for Makin yelets, No.204,716. Patented June 11, 1878 UNITEDSTATES PATENT QFFIGE ADOLPH DELKESGAMP AND FRANKLIN B. BRADLEY, OFSOUTHINGTON, CONNECTICUTjSAID DELKESGAMP ASSIGNOB TO SAID BRADLEY.

IMPROVEMENT IN MACHINES FOR MAKING EYELETST Specification formingpart ofLetters Patent No. 204,716, dated June 11, 1878; application filedOctober 4, 1877.

To all whom it may concern ington, in the county of Hartford and Stateof Connecticut, have invented certain new and useful Improvements inMachines for Making Eyelets, of which the following is a specification:

Our machine is designed for the manufacture of eyelets from cup-shapedblanks previously formed in any suitable machine; and the illventionconsists of the peculiar construction a and operation of devices, in thecombination of parts for and in the manner of swaging said blanks intoproper form, removing the end therefrom, and then throwing the finished-eyelet out of the machine, as hereinafter described.

In the accompanying drawings, Figure 1 is a front elevation of a machinefor making eyelets which embodies our invention. Figs. 2, 3, and 4 areenlarged sectional views of detached parts, showing three differentoperations, hereinafter explained. Fig. 5 is an under-side view of saidmachine. Fig. 6 is a vertical section of detached parts on line a w ofFig. 7. Fig. 7 is a plan view of the die-table of said machine, and Fig.Sis a sectional view of a blank from which the eyelets are made with ourmachine.

Motion may be imparted to the main shaft A, Fig. 5, in any propermanner. On one end of said shaft is a disk, B, carrying crank-pin a andpitman I), connected to the verticallyreciprocating carriage C, Fig. l,which carries the several punches, said pitman being indicated by brokenlines in Fig. 1. Parallel to the main shaft A is a counter-shaft, D, thetwo shafts being connected by suitable gear, so as to revolve together.Upon the shaft D is a flanged hub, E, provided with a single peripheralflange, 0, which extends about one and three-quarters time around thehub, the two ends lapping by each other for aboutthreequarters of theway around said hub. The portion of this flange where there is no lap isspiral or inclined, as at d, which inclined portion d crosses the edgeof the hub, while the other portions of said flange are straight and 7parallel to each other and the sides of the hub.

Upon the under side of the bed F there is a spur-wheel, G, having twelveteeth, with which the flange c of the hub E engages. As the hubrevolves, the inclined portion d of the flange 0 moves the wheel Gr onetooth, which movement takes place during a quarter-revolution of theshaftD. When the incline passes the teeth of wheel G, the straightportion of the flange c is engaged therewith, and holds the wheelperfectly motionless for t-hreequarters of a revolution of the shaft D,when the incline again moves the wheel G one tooth or one-twelfth of arevolution, when the straight portion again holds it motionless, wherebyit will be seen that the wheel G revolves with an intermittent motion.By means of a short vertical shaft through the bed F, the wheel G isconnected to the die-table H, whereby said die-table also revolves withan intermittent motion.

The crank-pin for imparting motion to the carriage G is so placedrelatively to the incline d of flange c that the movement of thedie-table takes place when the carriage O and its punches are in, ornearly in, their most elevated position. The die-table is provided withas many dies as there are teeth in the spurwheel G, which dies may beformed directly in said table, or in separate blocks or removable diese, Figs. 2, 3, and 4., let into sockets in the die-table H, as shown inFig. 3, in which case there may be a die at each end of the blocks. Thedies in these blocks or table are all of them formed alike, and thecounter part of the sides of a finished eyelet but sunk straight in alittle below the top surface of the die-blocks, as shown in Figs. 2, 3,and 4.

The cup-shaped blanks represented by the enlarged sectional view, Fig.8, are placed in the dies of the die-table by hand, or by means of anysuitable automatic feeding mechanism, as may be desired. When a die witha cupshaped blank,Fig. 8, placed in it comes under the punch 1, thetable is held stationary by means of the straight portion of the flangec, as before described, and the carriage O descends, thereby bringingthe square end of the short punch 1 against the end of the blank. andforcing it into the die with its top edge even with the top face of thedie. If desired,-the

punch may be made of about the same diameter as the straight portion ofthe die, so that said punch may enter it a short distance without injuryto the machine, in order to avoid the fine adjustment necessary to stopthe punch at an exact point. All of the punches may be made adjustableand held in place by proper set-screws, which it is not necessary toshow.

The action of the punch 1 is to plant the blank firmly and squarely inthe die for subsequent operation, and, in doing so, the lower roundingcorners are swaged inward slightly, as represented in Fig. 4. Becausethe punch 1 bears only upon the end of the blank and is not forced downinto the die, the blank may rock on its solid and rounded end after thepunch strikes it, so that it may right itself up "within the die and besquarely seated therein.

After thus seating the blank the carriage O and its punches rise,leaving the partiallyswaged blank firmly placed in the die, whenthe'mechanism before described rotates the die-table one-twelfth of arevolution and brings the said blank under the punch 2, the

form of which is the counterpart of the inside of a finished eyelet,which punch is forced into the die and swages the blank into its finalform, except that its solid end has not beenremoved, as shown in Fig. 2.

The next reciprocation of the carriage O -withdraws the punch 2, theblank still remaining in the die, when the next intermittent :movementof the die-table brings the die under the compound punch 3 f. This punchconsists of the punch proper 3, which is of the size and' shape designedfor the hole in the small end of theeyelet, and of the-spring-followerf, fitted to slide up and down on the punch proper, and continuallypressed downward by a spring, g, Fig. 1, coiled either directly aroundthe punch or around a parallel sliding. shaft at its sides, as shown insaid figure.

When the follower is depressed the general shapeof the compound punch;3fissubstantially the same as that of punch 2, and it fits the inside oftheblank.

When it -descends into the die and blank,

the whole punchis first firmly planted within said blank, the spring 9pressing the follower downward with all its power; but as the followercannot go'any farther the further movepunch descends, which followerfirmly and squarely holds the blank immovable within the die while thesolid end is being punched out.

Within the die 0 and below the small end 7 of the blank, at a distancefrom said blank less thanthe diameter of the disk punched out, is thetable-end h of the knock-out i. The lower end of this knock-out restsupon the upper surface of the elevated bed I, whereby it is supported inposition under the punch 3 f, as shown in Fig. 3.

W hen the disk or slug is punched out it often hangs on one side of thedie; and if the metal is very thin or the punch a little dull, the slughas a tendency to turn as on a hinge and let the punch slip by itwithout complete- 1y severing the disk from the end of the eyelet-blank.The table end h of the knock-out i is placed and held in the positionshown to avoid such a result.

Whenever the metal hangs at one edge and the disk or slug turns downinto the position shown in Fig. 3, it is stopped from turning downfarther by contact with said table end, which holds it at an angle tothe path of the punch 3, so that the further movement of said punchcompletely severs the disk or slug from the eyelet. Although this tableend is held a distance from the die lessthan the diameter of the slug,still it is so far below the lower end of the eyelet as to allow thepunch 3 to pass completely through the same without contact with thistable end.

The die-table H is mounted on the elevated bed I, which might, ifdesired, be a part of the bed F. Through the bedsF I is a plunger, k,the lower end of which is connected to the end of a spring, m, so as tomove both ways therewith.

Upon the shaft D is a cam or pin, a, which, at every revolution of theshaft D, lifts the spring m and throws the plunger kupward, said actiontaking place when the die is stopped directly over the end of thePlunger.

All of the several dies are provided with the knock-out i.

Theplunger is so located that the die last operated upon will come overtheplunger at the second twelfth of a revolution after leav- -ing punch3. The plunger 7c, in moving upward, comes in contact with the lower endof the knock-out i, and carries it into the positionshown in Fig. 6,when the eyelet is necessarily thrown out of the die. The cam or pin athen recedes from the springm, which springs downward and draws theplunger down with its upper end about even with the upper surface of theelevated bed I.

If desired, the lower end of the knock-out might be made larger thanthe. upper end of the plunger and the hole. in which it works, so thatin case the plunger is lowered below the upper surface of the bed I, theknockout will not fall down below the upper surface of said bed. At thenext twelth revolution of the die-table the die and knock-out will becarried along with the die over a solid portion of the bed-I, as showninFigs. 3 and 6. In case the knock-outs 13 i do not fall down upon thebed I of their own weight, they will be forced down by refilling thedies with new blanks before they come under the punch 1.

We have herein followed only one blank-on its course through the machinebut if the dies are properly supplied allof the several operations willtake place simultaneously, and when the machine is once under way aneyelet is formed at every reciprocation of the carriage 0.

We claim as our invention- 1. In a machine for making eyelets, the punch2 and intermittingly-moving series of dies in which the eyelet-blanksare swaged, in combination with bottom-removing punch 3, havingspring-follower f, shaped to fit the interior of the blank as swaged bydies and punch 2, whereby the bottoms of the eyelets are removed withoutremoving them from the die in which they are swaged, substantially asdescribed, and for the purpose set forth.

2. That improvement in the art of making eyelets frompreviously-prepared cup-shaped blanks, which consists, first, ofpartially swaging said blank andleaving aportion unswaged, producingthereby the form shown in Fig. 4; second, striking the result of thefirst operation by another punch to force it farther into the same dieand complete its form 5 and, third,

striking the result of the second operation by means of another punch,which removes its solid end, all of said punches operating upon theblank while in the same die and without removing it therefrom,substantially as described, and for the purpose specified.

3. In combination with the intermittinglyrevolving die-table H and itsbed I, a die and punch for removing the end of an eyelet-blank, theknock-out i, and its table end h firmly supported at a distance from theend of the blank less than the diameter of the piece to be removed, andwith a space between said table end and the end of the blank,substantially as described, and for the purpose specified.

ADOLPH DELKESOAMP. FRANKLIN B. BRADLEY.

Witnesses:

G. M. DEARTI-I, T. B. SMITH.

